The only information used from cellinfo field is whenever flash is SLC
or MLC, therefore eliminate it completely. This patch is based on Linux
commit 7db906b79f69.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Linux commit e80eba758151 adapted for Barebox:

  None of the existing drivers are overloading the ->scan_bbt()
  method, let's get rid of it and replace calls to ->scan_bbt()
  by nand_create_bbt() ones.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Linux commit 17799359e7b adapted for Barebox:

  This implementation detail is no longer needed outside of nand_bbt.c.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Linux commit b32843b772db adapted for Barebox:

  nand_base.c shouldn't have to know the implementation details of
  nand_bbt's in-memory BBT. Specifically, nand_base shouldn't perform the
  bit masking and shifting to isolate a BBT entry.

  Instead, just move some of the BBT code into a new nand_markbad_bbt()
  interface. This interface allows external users (i.e., nand_base) to
  mark a single block as bad in the BBT. Then nand_bbt will take care of
  modifying the in-memory BBT and updating the flash-based BBT (if
  applicable).

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add Winbond 0xef manufacturer ID for NAND flashes to support Winbond as
an additional manufacturer.

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>

Older versions of the ONFI spec do not support get/set features, so
do not call these commands when they are not available.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

dev_add_param_enum allows to pass a priv * so that the device_d *
argument is not needed and can be removed later.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Ported from Linux commit 974647e:
| Add a converter to retrieve NAND timings from an ONFI NAND timing mode.
| At the moment, only SDR NAND timings are supported.
|
| Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
| Signed-off-by: Brian Norris <computersforpeace@gmail.com>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Ported from Linux commit bb5fd0b6da:

|  Define a struct containing the standard NAND timings as described in NAND
|  datasheets.
|
|  Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
|  Signed-off-by: Brian Norris <computersforpeace@gmail.com>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Until now we did not support subpage reads for smaller binary sizes.
Scanning UBI volumes on large page NANDs can be painfully slow,
subpage reads can speed this up significantly, so enable subpage reads.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Similar to what the kernel does in e004debda (mtd: nand: add "page" argument for
read_subpage hook).

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This adds the bitflip check helper functions from the kernel. They are
used to check for bitflips in erased pages and correct them in the
buffer so that UBI can work with it. Unfortunately most nand controllers
do not have ECC for erased pages and don't do this on their own.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This one is available in the kernel and used by the denali driver

Signed-off-by: Enrico Jorns <ejo@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The default nand_read_subpage implementation returns -ENOSUPP, so we have
to make sure that barebox never uses this implementation. By setting the
NAND_SUBPAGE_READ flag to 0x0 we ensure NAND_HAS_SUBPAGE_READ() never returns
true and also give the compiler a chance to optimize away some unused code.

subpage reads are a rather exotic feature even in Linux. It is only used on
largepage NANDs with soft ecc. Even if we have this case it needs non page
aligned reads to actually profit from this feature.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Hattink, Tjalling [FINT] <T.Hattink@fugro.nl>

This updates the NAND stuff to Linux-3.11-rc1. It is synchronized
as best as we can get:

- locks removed
- The splitting in different files we had to better support different
  features has been dropped. Instead this is now done mostly with the
  use of __maybe_unused

Some barebox adjustments are forward ported, like:

- Allow partial page writes
- Optionally allow to erase bad blocks
- check for all_ff before writing a page

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This introduces the ecc stength fields in the structures and fills
them in, but leaves them unused right now.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

To sync with the kernel.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This file is present in current kernels. In order to get closer
to current mtd support introduce it for barebox aswell.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This allows us to have some NAND specific stuff during registration,
like for example adding NAND specific device parameters.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This introduces a new NAND_BUSWIDTH_AUTO flag which can be used
to automatically detect the nand buswidth. The id is always read
in 8bit mode. An additional callback is needed to switch the nand
controller into 16bit mode.
This currently depends on a safe read_byte (always) and read_buf
(for onfi-only flashes) callback. It has been tested on OMAP, but
is not something that generally works. For this reason the existence
of the set_buswidth callback is used to determine whether we are
able to do autodetection or not.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

the code is taken from linux & u-boot implementations
Validated on an i.MX53 which gives the following log :
ONFI flash detected ... ONFI param page 0 valid
NAND device: Manufacturer ID: 0x2c, Chip ID: 0x38 (Micron MT29F8G08ABABAWP), page size: 4096, OOB size: 224

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Sync these limits with the Linux kernel. This allows support for NAND devices
with page size of 4k.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Patch fix following sparse warnings:
drivers/mtd/nand/nand_s3c2410.c:125:9:
warning: incorrect type in argument 1 (different base types)
	expected void const volatile [noderef] <asn:2>*<noident>
	got unsigned long

Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Patch fix following sparse warning:
drivers/mtd/nand/nand_base.c:123:16:
warning: incorrect type in argument 1 (different address spaces)
	expected void const volatile [noderef] <asn:2>*<noident>
	got void *IO_ADDR_R

Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>